Sock



FIG. 1 is a front perspective view of a sock showing my new design in an in-use configuration;

FIG. 2 is a side view thereof;

FIG. 3 is a second side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The dash-dot-dash broken lines immediately adjacent to the shaded area represent boundaries of the sock which form no part of the claim. 

CLAIM The ornamental design for a sock, as shown and described. 